At what cabin pressure altitude will passenger oxygen masks deploy?

Passenger oxygen masks deploy automatically when the cabin pressure altitude exceeds a specific threshold that is meant to ensure passenger safety in the event of a rapid decompression. The correct altitude at which this occurs is 14,500 feet.

At this altitude, the partial pressure of oxygen becomes insufficient to support normal physiological functions without supplemental oxygen. By implementing deployment at this altitude, airlines ensure that passengers can receive sufficient oxygen before any adverse effects of hypoxia occur. Regulations and safety protocols are designed to protect passengers during high-altitude flight, where cabin pressure might drop unexpectedly. The deployment mechanism is a critical safety feature in commercial aircraft, enhancing passenger safety and comfort.

Understanding this concept is key for those studying aviation safety and operations, as it underscores the importance of preparedness in managing in-flight emergencies.